IBM 3708 Description page 191

User-defined UDT name
This is a 9-byte field used to define the name for the UDT. This name is
displayed on the 3708 terminal selection screen (C2). This first byte of
the field should contain the count (in hexadecimal) of the number of
characters in the name, which should be entered as EBCDIC characters.
If the count is not a number from I to 8, the default UDT name is used
("UDTOI" - "UDT04").
User-Defined Terminal Logon Initialization Sequence (TLIS)
4-70
IBM 3708
Description
The 3708 lets you send a hard-coded terminal initialization sequence, a
user-defined sequence (TLIS), both, or neither.
This is a 61-byte field used to define a sequence to be sent to the terminal
at the beginning of the protocol conversion session. The first byte of the
field should contain the count(in hexadecimal) of the number of
characters in the sequence. The remaining 60 bytes of the field contain
the actual sequence to be sent, and should be entered as ASCII
characters. If the count is not a number from I to 60, a user-defined
TLIS is not sent.
This field is used along with bit 6 of the flags field as follows:
TLIS
Bit 6 Count Meaning
0 =0 Send only the 3708 initialization sequence
0
> 0
Send the 3708 initialization sequence followed by
the user-defined sequence
1 =0 Send no initialization sequence
I
> 0
Send only the user-defined sequence